[U-Boot] [PATCH v2 2/3] wandboard: Add support for carrier board MicroSD card
Otavio Salvador
otavio at ossystems.com.br
Tue Apr 16 00:14:01 CEST 2013
Allow use of the carrier board MicroSD card available in the
Wandboard; this allow for loading alternative system from the other
card for testing or upgrade proposes.
Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
---
Changes in v2:
- Return -EINVAL when trying to initialize a wrong controller
arch/arm/include/asm/arch-mx6/mx6dl_pins.h | 7 ++++
board/wandboard/wandboard.c | 59 +++++++++++++++++++++++++++---
include/configs/wandboard.h | 1 +
3 files changed, 61 insertions(+), 6 deletions(-)
diff --git a/arch/arm/include/asm/arch-mx6/mx6dl_pins.h b/arch/arm/include/asm/arch-mx6/mx6dl_pins.h
index b8e6bf0..8cedbdc 100644
--- a/arch/arm/include/asm/arch-mx6/mx6dl_pins.h
+++ b/arch/arm/include/asm/arch-mx6/mx6dl_pins.h
@@ -103,6 +103,7 @@ enum {
MX6_PAD_GPIO_17__GPIO_7_12 = IOMUX_PAD(0x05E8, 0x0218, 5, 0x0000, 0, 0),
MX6_PAD_GPIO_18__GPIO_7_13 = IOMUX_PAD(0x05EC, 0x021C, 5, 0x0000, 0, 0),
MX6_PAD_GPIO_19__GPIO_4_5 = IOMUX_PAD(0x05F0, 0x0220, 5, 0x0000, 0, 0),
+ MX6_PAD_GPIO_2__GPIO_1_2 = IOMUX_PAD(0x05F4, 0x0224, 5, 0x0000, 0, 0),
MX6_PAD_GPIO_5__GPIO_1_5 = IOMUX_PAD(0x0600, 0x0230, 5, 0x0000, 0, 0),
MX6_PAD_GPIO_5__I2C3_SCL = IOMUX_PAD(0x0600, 0x0230, 6 | IOMUX_CONFIG_SION, 0x0878, 2, 0),
MX6_PAD_KEY_COL3__I2C2_SCL = IOMUX_PAD(0x0638, 0x0250, 4 | IOMUX_CONFIG_SION, 0x0870, 1, 0),
@@ -135,8 +136,14 @@ enum {
MX6_PAD_RGMII_TD3__ENET_RGMII_TD3 = IOMUX_PAD(0x06B8, 0x02D0, 1, 0x0000, 0, 0),
MX6_PAD_RGMII_TX_CTL__RGMII_TX_CTL = IOMUX_PAD(0x06BC, 0x02D4, 1, 0x0000, 0, 0),
MX6_PAD_RGMII_TXC__ENET_RGMII_TXC = IOMUX_PAD(0x06C0, 0x02D8, 1, 0x0000, 0, 0),
+ MX6_PAD_SD1_CLK__USDHC1_CLK = IOMUX_PAD(0x06C4, 0x02DC, 0, 0x0928, 1, 0),
+ MX6_PAD_SD1_CMD__USDHC1_CMD = IOMUX_PAD(0x06C8, 0x02E0, 0 | IOMUX_CONFIG_SION, 0x0000, 0, 0),
MX6_PAD_SD1_CMD__GPIO_1_18 = IOMUX_PAD(0x06C8, 0x02E0, 5, 0x0000, 0, 0),
MX6_PAD_SD1_DAT3__GPIO_1_21 = IOMUX_PAD(0x06D8, 0x02F0, 5, 0x0000, 0, 0),
+ MX6_PAD_SD1_DAT0__USDHC1_DAT0 = IOMUX_PAD(0x06CC, 0x02E4, 0, 0x0000, 0, 0),
+ MX6_PAD_SD1_DAT1__USDHC1_DAT1 = IOMUX_PAD(0x06D0, 0x02E8, 0, 0x0000, 0, 0),
+ MX6_PAD_SD1_DAT2__USDHC1_DAT2 = IOMUX_PAD(0x06D4, 0x02EC, 0, 0x0000, 0, 0),
+ MX6_PAD_SD1_DAT3__USDHC1_DAT3 = IOMUX_PAD(0x06D8, 0x02F0, 0, 0x0000, 0, 0),
MX6_PAD_SD3_CLK__USDHC3_CLK = IOMUX_PAD(0x06F4, 0x030C, 0, 0x0934, 1, 0),
MX6_PAD_SD3_CMD__USDHC3_CMD = IOMUX_PAD(0x06F8, 0x0310, 0 | IOMUX_CONFIG_SION, 0x0000, 0, 0),
MX6_PAD_SD3_DAT0__USDHC3_DAT0 = IOMUX_PAD(0x06FC, 0x0314, 0, 0x0000, 0, 0),
diff --git a/board/wandboard/wandboard.c b/board/wandboard/wandboard.c
index a8f6ba2..c9f53cd 100644
--- a/board/wandboard/wandboard.c
+++ b/board/wandboard/wandboard.c
@@ -52,6 +52,18 @@ static iomux_v3_cfg_t const uart1_pads[] = {
MX6_PAD_CSI0_DAT11__UART1_RXD | MUX_PAD_CTRL(UART_PAD_CTRL),
};
+iomux_v3_cfg_t const usdhc1_pads[] = {
+ MX6_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD1_DAT0__USDHC1_DAT0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD1_DAT1__USDHC1_DAT1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD1_DAT2__USDHC1_DAT2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD1_DAT3__USDHC1_DAT3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ /* Carrier MicroSD Card Detect */
+ MX6_PAD_GPIO_2__GPIO_1_2 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+#define USDHC1_CD_GPIO IMX_GPIO_NR(1, 2)
#define USDHC3_CD_GPIO IMX_GPIO_NR(3, 9)
static iomux_v3_cfg_t const usdhc3_pads[] = {
@@ -100,8 +112,9 @@ static void setup_iomux_enet(void)
gpio_set_value(ETH_PHY_RESET, 1);
}
-static struct fsl_esdhc_cfg usdhc_cfg[1] = {
+static struct fsl_esdhc_cfg usdhc_cfg[2] = {
{USDHC3_BASE_ADDR},
+ {USDHC1_BASE_ADDR},
};
int board_mmc_getcd(struct mmc *mmc)
@@ -110,6 +123,9 @@ int board_mmc_getcd(struct mmc *mmc)
int ret = 0;
switch (cfg->esdhc_base) {
+ case USDHC1_BASE_ADDR:
+ ret = !gpio_get_value(USDHC1_CD_GPIO);
+ break;
case USDHC3_BASE_ADDR:
ret = !gpio_get_value(USDHC3_CD_GPIO);
break;
@@ -120,13 +136,44 @@ int board_mmc_getcd(struct mmc *mmc)
int board_mmc_init(bd_t *bis)
{
- imx_iomux_v3_setup_multiple_pads(usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
+ int i;
+ int ret = 0;
- usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
- usdhc_cfg[0].max_bus_width = 4;
- gpio_direction_input(USDHC3_CD_GPIO);
+ /*
+ * According to the board_mmc_init() the following map is done:
+ * (U-boot device node) (Physical Port)
+ * mmc0 SOM MicroSD
+ * mmc1 Carrier board MicroSD
+ */
+ for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+ switch (i) {
+ case 0:
+ imx_iomux_v3_setup_multiple_pads(
+ usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
+ usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+ usdhc_cfg[0].max_bus_width = 4;
+ gpio_direction_input(USDHC3_CD_GPIO);
+ break;
+ case 1:
+ imx_iomux_v3_setup_multiple_pads(
+ usdhc1_pads, ARRAY_SIZE(usdhc1_pads));
+ usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+ usdhc_cfg[1].max_bus_width = 4;
+ gpio_direction_input(USDHC1_CD_GPIO);
+ break;
+ default:
+ printf("ERROR: you configured more USDHC controllers"
+ "(%d) than supported by the board\n", i + 1);
+ return -EINVAL;
+ }
+
+ ret |= fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+ }
+
+ if (ret)
+ printf("ERROR: failed to initialize mmc dev %d\n", i);
- return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
+ return ret;
}
static int mx6_rgmii_rework(struct phy_device *phydev)
diff --git a/include/configs/wandboard.h b/include/configs/wandboard.h
index 120e3f6..161b400 100644
--- a/include/configs/wandboard.h
+++ b/include/configs/wandboard.h
@@ -57,6 +57,7 @@
/* MMC Configuration */
#define CONFIG_FSL_ESDHC
#define CONFIG_FSL_USDHC
+#define CONFIG_SYS_FSL_USDHC_NUM 2
#define CONFIG_SYS_FSL_ESDHC_ADDR 0
#define CONFIG_MMC
--
1.8.1
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